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Title:
ELECTRODE CATALYST, COMPOSITION FOR FORMING GAS DIFFUSION ELECTRODE, GAS DIFFUSION ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY, AND FUEL CELL STACK
Document Type and Number:
WIPO Patent Application WO/2018/159524
Kind Code:
A1
Abstract:
Provided is an electrode catalyst which has high durability compared with conventional Pt/C catalysts and which contributes to cost reduction. The electrode catalyst of the present invention comprises a carrier and catalyst particles carried on the carrier. The catalyst particles comprise a core portion, a first shell portion formed on the core portion, and a second shell portion formed on the first shell portion. The core portion includes WC and a W carbide including WC1-x(0 < x < 1). The first shell portion includes Pd (0 valence). The second shell portion includes Pt (0 valence). Core particles as a precursor of the core portion satisfy the condition of an expression (1): 0.03 ≤ {I2/(I1 + I2)} ≤ 0.75, where I1 and I2 are respectively the intensity of a peak attributed to WC and the intensity of a peak attributed to WC1-x(0 < x < 1), as determined by XRD measurement of the core particles.

Inventors:
NAGAMORI KIYOTAKA (JP)
MIZUSAKI TOMOTERU (JP)
NAKAMURA YOKO (JP)
IGARASHI HIROSHI (JP)
SEKI YASUHIRO (JP)
Application Number:
PCT/JP2018/006928
Publication Date:
September 07, 2018
Filing Date:
February 26, 2018
Export Citation:
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Assignee:
N E CHEMCAT CORP (JP)
International Classes:
H01M4/86; H01M4/90; H01M4/92; H01M8/10
Domestic Patent References:
WO2016031251A12016-03-03
Foreign References:
JP2008021610A2008-01-31
Attorney, Agent or Firm:
IPR CONSULTANT PPC (JP)
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